public void DoUndo()
{
UndoRedoCommandCollection undoCommad = undoStack.Pop();
redoStack.Push(undoCommad); //push command onto redo stack
undoCommad.Undo(); //perform undoCommand's overidden Undo command
}
public void DoRedo()
{
UndoRedoCommandCollection redoCommad = redoStack.Pop();
undoStack.Push(redoCommad); //push command onto undo stack
redoCommad.Redo(); //perform redoCommand's overidden Undo command
}
} //title of the top cmd on redo stack
public void PushUndo(UndoRedoCommandCollection command)
{
undoStack.Push(command); //push command onto undo stack
}